<template>
    <div class="container">
        <grid-layout
            class="grid"
            :layout.sync="layout"
            :margin="margin"
            :col-num="colNum"
            :row-height="rowHeight"
            :is-draggable="draggable"
            :is-resizable="resizable"
            :vertical-compact="true"
            :use-css-transforms="true"
        >
            <grid-item v-for="item in layout"
                       :static="item.static"
                       :x="item.x"
                       :y="item.y"
                       :w="item.w"
                       :h="item.h"
                       :i="item.i"
            >
                <span class="text">{{ itemTitle(item) }}</span>
            </grid-item>
        </grid-layout>
    </div>
</template>

<script>
import {GridLayout, GridItem} from "vue-grid-layout"

export default {
    components: {
        GridLayout,
        GridItem
    },
    data() {
        return {
            layout: [
                {"x": 0, "y": 0, "w": 2, "h": 2, "i": "0", static: false},
                {"x": 2, "y": 0, "w": 2, "h": 4, "i": "1", static: true},
                {"x": 4, "y": 0, "w": 2, "h": 5, "i": "2", static: false},
                {"x": 6, "y": 0, "w": 2, "h": 3, "i": "3", static: false},
                {"x": 8, "y": 0, "w": 2, "h": 3, "i": "4", static: false},
                {"x": 10, "y": 0, "w": 2, "h": 3, "i": "5", static: false},
                {"x": 0, "y": 5, "w": 2, "h": 5, "i": "6", static: false},
                {"x": 2, "y": 5, "w": 2, "h": 5, "i": "7", static: false},
                {"x": 4, "y": 5, "w": 2, "h": 5, "i": "8", static: false},
                {"x": 6, "y": 3, "w": 2, "h": 4, "i": "9", static: true},
                {"x": 8, "y": 4, "w": 2, "h": 4, "i": "10", static: false},
                {"x": 10, "y": 4, "w": 2, "h": 4, "i": "11", static: false},
                {"x": 0, "y": 10, "w": 2, "h": 5, "i": "12", static: false},
                {"x": 2, "y": 10, "w": 2, "h": 5, "i": "13", static: false},
                {"x": 4, "y": 8, "w": 2, "h": 4, "i": "14", static: false},
                {"x": 6, "y": 8, "w": 2, "h": 4, "i": "15", static: false},
                {"x": 8, "y": 10, "w": 2, "h": 5, "i": "16", static: false},
                {"x": 10, "y": 4, "w": 2, "h": 2, "i": "17", static: false},
                {"x": 0, "y": 9, "w": 2, "h": 3, "i": "18", static: false},
                {"x": 2, "y": 6, "w": 2, "h": 2, "i": "19", static: false}
            ],
            draggable: true,
            resizable: true,
            margin: [10, 10],
            colNum: 12,
            rowHeight: 30,
            index: 0
        }
    },
    computed: {
        /*styleObject() {
            const rowHeightMargin = this.rowHeight + this.margin[0];
            return {
                "background-size": "calc(calc(100% - " + this.margin[0] + "px) / " + this.colNum + ") " + rowHeightMargin + "px",
                "margin": this.margin[0] + "px",
            }
        }*/
    },
    methods: {
        itemTitle(item) {
            let result = item.i;
            if (item.static) {
                result += " - Static";
            }
            return result;
        }
    }
}
</script>

<style>

.grid::before {
    content: '';
    background-size: calc(calc(100% - 5px) / 12) 40px;
    background-image: linear-gradient(
        to right,
        lightgrey 1px,
        transparent 1px
    ),
    linear-gradient(to bottom, lightgrey 1px, transparent 1px);
    height: calc(100% - 5px);
    width: calc(100% - 5px);
    /*height: 100%;*/
    /*width: 100%;*/
    position: absolute;
    background-repeat: repeat;
    margin:5px;
}

.vue-grid-layout {
    background: #eee;
}

.vue-grid-item:not(.vue-grid-placeholder) {
    background: #ccc;
    border: 1px solid black;
}

.vue-grid-item .resizing {
    opacity: 0.9;
}

.vue-grid-item .static {
    background: #cce;
}

.vue-grid-item .text {
    font-size: 24px;
    text-align: center;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    height: 100%;
    width: 100%;
}

.vue-grid-item .no-drag {
    height: 100%;
    width: 100%;
}

.vue-grid-item .minMax {
    font-size: 12px;
}

.vue-grid-item .add {
    cursor: pointer;
}

.vue-draggable-handle {
    position: absolute;
    width: 20px;
    height: 20px;
    top: 0;
    left: 0;
    background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'><circle cx='5' cy='5' r='5' fill='#999999'/></svg>") no-repeat;
    background-position: bottom right;
    padding: 0 8px 8px 0;
    background-repeat: no-repeat;
    background-origin: content-box;
    box-sizing: border-box;
    cursor: pointer;
}


</style>
